Mechanical bell-ringing device.



H. VON REPPERT. MECHANICAL BELL RINGING DEVICE.

APPLICATION FILED DEC. 2a, 1913.

5 Patented Jafi.12,1915.

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ark/7w HANS voN REIPERT, OF COLOGNE, GERMANY.

MECHANICAL IBELL-RINGING DEVICE.

Specification of Letters Patent.

Patented Jan. 12, 1915.

Application filed December 23, 1913. Serial No. 808,380.

To all whom it-may concern Be it known that I, HANS VON REPPERT, asubject of the German Emperor, residing at Cologne, Germany, haveinvented new and useful Improvements in Mechanical Bell-Ringing Devices,of which the following is a specification.

This invention relates to a bell ringing device driven by an electricmotor which is coupled with thebell during each oscillation only for adetermined fraction of the oscillation of the bell.

The invention is characterized by the following arrangement. Arranged onthe motor shaft is a stationary and an auxiliary movable friction wheelconnected to the axis of the hell by an endless pulling medium andadapted to be thrown in and out by means of centrifugal weights.Moreover actuated from the axis of the bell by means of a second pullingmedium is a switch arrangement by means of which a circuit is closed atappropriate'moments or reversed.

The improved bell ringing device is illustrated in the accompanyingdrawing in Figure 1 in a front view, and in Fig. 2 in a lateral view.Fig. 3 shows on a reduced scale the amplitude of oscillation and Fig. 4

represents the switch and circuit arrangement.

Arranged on the shaft 6 of the motor a is a friction clutch c, oconstituted by two conical friction wheels of which the wheel a is faston the shaft and the .wheel 0 axially movable thereon. This latter wheelby means of an endless chain 6 is connected Iwitlh the axis or rockingshaft f of the d are centrifugal weights by the movement of which themovable friction wheel is pressed against the stationary friction wheelby means of the rods (1. During the oscillation of the bell g moreover ashaft 2' is actuated through the agency of an endless cord it, thisshaft carrying two contact members or arms 70 7:. These contact arms asshown particularly in Fig. 2 are adapted to move between two members u,o and u, 2) respectively arranged on loose contact disks 1 and Z. Eachof these contact disks has its circumference composed of anon-conductive segment n or n and of two separate contact rails p, q orp and q separated by an" insulating member 0 and 0 respectively. Adaptedto wipe along these contact members are brushes r,'r'. In the presentinstance use is made of a three-phase motor. According to Fig. 4, of thethree conductors 8, s .9 the conductor 8' is directly connected to onepole t of the motor. In this circuit arrangement and for the purpose ofclearness the two contact disks Z and Z are shown superposed althoughthey are loosely arranged on the same shaft 2'. The other two conductorss and s are attached to the contact arms 70, k.

In accordance with Fig. 3 the bell is to move commencing from one end ofits amplitude 1, first along the arc portion 1 and 2 freely, then alongthe are portion 2, 3, that is to say, to about the center of itsamplitude by means of the motor and ulti mately should continue freelyto complete the remaining are portion 3, 4 in upward direction. In thisoscillation of the bell the contact arms 70 and 70 by means of theendless rope k are rotated in the same direction as indicated by thearrows shown whereby the said arms are brought into contact with themembers it and u. Consequently a circuit is closed through the followingpath. 8 being attached directly to the pole t of the motor current flowsthrough-c Contact arm 1:, member u conductor w contact rail 7) brush 1'to the second pole t of the motor. In a similar manner current flows fom the conductor 8 to the third pole t. The motor therefore is suppliedwith current during the downward movement of the bell. It is acceleratedand on reaching a certain speed the centrifugal weights (Z th ow thefriction clutch c. 0' into action at the point 2 of the bell movement.The latter therefore is now driven along the are 2, 3. When the bellpasses the center position the contact disks Z Z carried along by thecontact arms 7: 7c assume approximately the central position shown inFig. 4 and in the further oscillating movement the contact rods (1 and qare brought under the brushes in the place of the contact rails 79 and7). The circuit is thus immediately broken and the bell oscillates alongthe are 3, 4 freely in upward direction in which action the centrifugalweights are caused to release. the friction clutch.

As soon as the bell resumes its downward oscillation. from the reversingpoint 4 the contact arms is and k are brought into engagement with themembers '0, 2) respectively, thereby effecting a reversal in theconductors s and s with the result that the current now flows in thefollowing manner: The current in s flows through the contact arms k,contact 4), conductor w, contact rail 9' and brush 1" to pole i of themotor. In a similar manner the current flows from the conductor 8through contact arm is, member o, conductor m, contact rail 9 and brush1' which now rests on g of the pole t of the motor. The latter thereforeis reversed and is rotated in the opposite direction. As soon as it hasreached a certain acceleration the centrifugal weights are caused tothrow the friction clutch into action and the bellreceives its drivedown to the center of its osc'illation, at which point the contact railsp again take the place of the contact rails g with regard to the wipingbrushes. The current therefore is interrupted and the bell iscausedfreely to move in an upward direction to the initial point 1,after which the same play is again repeated. Prior to the commencementof the oscillation the contact arms are fairly in the center between themembers '0 and u and 'v' and u respectively and therefore would produceno contact. In order however to enable. at the outset a mechanicalcommencement of the ringing to take place without manual assistance aresilient contact 3/ is arranged on the contact member u andv a similarcontact y on the contact member u and moreover the contact brushes r 7"are slightly unsymmetrical with regard to the initial position of thecontact disks so as,

to be in contact with the contact rails 70 p. Immediately upon switchingon current the -mctor therefore is driven causing the bell mechanicallyto commence its movements which gradually increase to their normalamplitude. In this way therefore an entirely mechanical operation isrendered possible both for initially ringing or starting the bell aswell as for its normal oscillations.

What I claim and desire to secure by Letters Patent is 1. A mechanicalbell ringing device comprising, in combination, avmotor, an oscillatingbell, means for connecting the bell intermittently with the motor tocause motive impulses to be imparted to the former throughout apredetermined portion of each oscillation, an electric circuit for themotor,

a switch device consisting of a rocking shaft, contact arms mountedfixedly upon the shaft, a pulling medium ccnnectin the said shaft withthe bell for oscillation t ere- With, loose contact disks mounted uponthe last-named shaft, engaging members arranged uponeach of said disksand between which the adjacent contact arm may oscillate, a pair ofinsulated contact rails arranged upon each contact disk, and contact 7brushes connected in the motor circuit and being mounted to wipe thecontact rails of the respective disks.

2. A mechanical bell ringing device comprising, in combination, a motor,an oscillating bell, means for connecting the bell intermittcntly'withthe motor to cause motive impulses to be imparted togthe formerthroughout a predetermined portion of each oscillation, an electriccircuit for the motor, a switch" device consisting of a rocking shaft,contact arms mounted fixedly upon the shaft, a pulling medium connectingthe said shaft with the bell for oscillation therewith, loosecontactdisks mounted upon the last-named shaft, engaging membersarranged upon each of said disks and between which the adjacent contactarm may oscil-.

late, a pair of insulated contact rails arranged upon each contact disk,contact brushes connected 1n the motor circuit and being mounted to wipethe contact rails of the respective disks, and a spring contact name tothis specification in the presence of two subscribing witnesses.

HANS VON REPPERT.

lVitnesses:

LOUIS VANDORY, OSCAR DEPNER.

